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Annotation of coherent/a/usr/man/COHERENT/tr, revision 1.1.1.1

1.1       root        1: 
                      2: 
                      3: tr                           Command                           tr
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                      7: 
                      8: Translate characters
                      9: 
                     10: ttrr [-ccddss] _s_t_r_i_n_g_1 [_s_t_r_i_n_g_2]
                     11: 
                     12: tr reads characters  from the standard input, possibly translates
                     13: each to another value or  deletes it, and writes to standard out-
                     14: put.
                     15: 
                     16: Each specified string  may contain literal characters of the form
                     17: a or  \b (where b  is non-numeric), octal  representations of the
                     18: form \ooo  (where o is  an octal digit), and  character ranges of
                     19: the form X-Y.  tr  rewrites each string with the appropriate con-
                     20: versions and range expansions.
                     21: 
                     22: If an input character is in string1, tr outputs the corresponding
                     23: character of  string2.  If string2  is shorter than  string1, the
                     24: result is the last character in string2.
                     25: 
                     26: The following flags control how ttrr translates characters:
                     27: 
                     28: -cc Replace string1 by the set of characters not in string1.
                     29: 
                     30: -dd Delete characters in string1 rather than translating them.
                     31: 
                     32: -ss The  ``squeeze'' option: map a sequence  of the same character
                     33:    from string1 to one output character.
                     34: 
                     35: ***** Example *****
                     36: 
                     37: The following example prints all sequences of four or more spaces
                     38: or printing characters from infile:
                     39: 
                     40: 
                     41:         tr -cs ' -~' '\12' <infile | grep ....
                     42: 
                     43: 
                     44: Here string1 is the range from <ssppaaccee> to `~', which includes all
                     45: printing characters.  Because this example uses the flags -cs, tr
                     46: maps sequences of nonprinting characters to newline (octal 12).
                     47: 
                     48: ***** See Also *****
                     49: 
                     50: ASCII, commands, ctype, sed
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                     64: COHERENT Lexicon                                           Page 1
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